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A307292 Number of black-and-white colored (or proper magnetic) space groups in dimension n, not counting enantiomorphs. 1
0, 3, 46, 1156, 51987 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..4.

R. L. E. Schwarzenberger, Colour symmetry, Bulletin of the London Mathematical Society 16.3 (1984): 216-229.

B. Souvignier, Enantiomorphism of crystallographic groups in higher dimensions with results in dimensions up to 6, Acta Cryst., A59 (2003), 210-220.

FORMULA

a(n) = A293062(n, n) - 2 * A004029(n). - Andrey Zabolotskiy, Apr 09 2019

CROSSREFS

For the case when enantiomorphs are counted see A307290.

Cf. A004029, A293062.

Sequence in context: A231789 A119401 A124135 * A307290 A193420 A339177

Adjacent sequences:  A307289 A307290 A307291 * A307293 A307294 A307295

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Apr 08 2019

EXTENSIONS

a(0), a(4) from Andrey Zabolotskiy, Apr 09 2019

STATUS

approved

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Last modified September 20 02:19 EDT 2021. Contains 347577 sequences. (Running on oeis4.)